Best Kaimenglong Phone Wall Chargers in 2026

Portable charger with one USB-A port (12-watt)

Apple MFi Certified ensures complete compatibility with iPhone 13/12/11/X/XR/XS/8/7/6/6s/5/5s/5c, iPhone Pro 13/12/11, iPhone Pro Max 13/12/11/XS, iPhone Plus 8/7/6/6s, iPhone SE 1st Gen/2nd Gen/3rd Gen, iPhone mini 13/12, Apple iPad, iPad Air, iPad Mini, iPad Pro, iPod Touch, iPod nano, Beats Pill+, Samsung Fold Z/ Galaxy S22/ S20/ S10/ S9/ S9 Plus/ S8/ S8 Plus/ S7/ S7 Edge/ S6/ S6 Edge/ S5/ Note 20 10 9 7/ 930QCG/ Google Nexus 6P/5X, Google Pixel 3/3XL/2/2XL, HTC One M9+/M9/A9/M8/E8, Motorola Razer, Moto Z, Huawei Mate10, P30/ P20, Blackberry, Nokia, Sony, LG U, LG G Stylo, LG G6/G5/G4/G3, LG V30/V20, PH-1, and any other USB outlet devices

Built-in device detection; USB port can provide up to 2.4 amps of power (does not support Quick Charge; devices equipped with Quick Charge will charge at normal speed)

The package Includes 1Pack 3 Port USB wall charger. Work for iPhone 14, 13, 13 Mini, 13 Pro, 13 Pro Max, 12, 12 Mini, 12 Pro, 12 Pro Max, SE, 11 Pro Max, XR, XS MAX, XS, X, 8 Plus, iPad Pro iPad Air, iPad mini. Samsung Galaxy S22 Ultra S21+ S20 S10 5G S10E S9 Plus S8+ Note 20 Ultra Note10 Plus Note 9 A52 A71 A51 A10E A13 A12 A80 A70 A50 A30 A20 A10, Google Pixel 6 Pro 5 4xl 4 4a 3xl 3a 2xl, LG G8 G7 ThinQ V60 V50 V40 V35 V30 V30s, HTC, Blu, LG, Motorola, Sony, Kindle Fire HD 10, E-Reader, etc.

Premium Performance: Dual-USB output with a total current of 5V/2.1A and input with 100-240V enables you to charge two mobile devices simultaneously at high speed. It can really save you time!

Lightweight: Home charger adapter allows charging at home or in the office via a USB cable connection. Simply plug in the USB cable, and plug the adapter into the wall. Compact, lightweight, portable, stylish, and easy to store.

【4 USB PORTS Fast Charge】4-USB output with total current 5V/4.8A and input with 100-240V. Enough power to charge 4 iPhones, iPods, tablets, smartphones, or other devices at full speed simultaneously. Suitable use for home, travel, office, and business trip, which meet your daily charging needs.

【Universal Compatibility】For iPhone, Samsung Galaxy, Motorola more iOS and Android phones or tablets, like iPhone 14 Pro Max 14Pro 13 Pro Max 12 11 Mini SE 2020 11 Xs XR Xs Max X 8 Plus 7 Plus 6S 6 Plus, Samsung Galaxy S22 S21+ Ultra 5G S21 S20 S10 S10E S9 S8 S7 S6 Edge S5, Note 20/10/9, A10 A10E A20 A51 A12 A71 A13 5G A12, Google Pixel 6 Pro 6a 5 4 xl 4a 3a 3, LG G8 G7 G6 G5, Stylo 6 5 4 3 2, V60 V50 V40 V30 V20, BLU, Moto, OnePlus, Kindle Fire E-book Readers, Moto Edge, G Power/Play, etc.

【Safety assurance】AILKIN'S charger has a protection system against overcharging, over-current and overheating. The charger will automatically stop charging when power is full, which can maximumly protect your device.

★【FAST CHARGING TEST】 We have tested over 1000 samples(3,300 mah battery)and came to a conclusion: The ChiChiFit charger can charging your phone 50% in 28-36 minutes, 70%-75% faster than standard chargers. Adaptive Fast Charger Kit will be a good choice for your cell phone emergency, 100-240 volt input are ideal for worldwide travel

★【Quick Fast Charging compatible with】Samsung Galaxy S6 / S6 Edge / S6 Plus / S6 Active / S7 / S7 Edge / S7 Plus / S7 Active / S8 / S8 Plus / S8 Active / S9 / S9 Plus / S9+ / S8 / S8+ / Note 8 / Note 9 and other Quick Charger 2.0 ( QC2.0 )supported devices. ( Samsung fast charger )

★【SAFEGUARD PROTECTION】Protects your device against over-heating, over-charging and over-current. Input 100V-240V (U.S. and World Standard); Output: DC 5.0V - 2Amp (U.S. and World Standard)

SAFETY GUARANTEE: Multiple built-in safeguards and intelligent integrated circuit identification technology to protect against short circuit, over-current, over-voltage, over-heating and over-charging. Automatically slows charging when battery capacity is full to ensure your device safety.

ADAPTIVE FAST CHARGING: Compatible Devices with Adaptive fast charging can charge up to 50% battery level in 30 minutes, 75% faster than standard chargers.

FAST CHARGE & SYNC CABLE: USB Type-C cable charges Samsung phones and tablets on the USB-C ports at max speed. Offers transfer of 480 Mbps designed for syncing smartphones, tablets, and Bluetooth speakers.

Pocket-ready Flip Blades- save space when traveling with convenient folding AC blades. This is the first flip blade TurboPower charger

TurboPower Through Your Life- Enjoy speedy, compact 18 Watt Turbo charging that gets you powered up fast. Qualcomm Quick Charge 3.0 (QC3.0) compatible.

Bold and Stylish- with a sleek matte exterior the TurboPower Flip is the oem charging partner that ships in box with the 2019/2020 Motorola Razr

UL, FCC, and PSE certified.

Charge speed 3.4A max, up to 2.4A per port.

It can charge up to two usb-a devices at once.

❉Premium Performance: Dual-USB output cell phone charger with a total current of 5V/2.4A and input with 100-240V enables you to charge two mobile devices simultaneously at high speed. It can really save you time.

❉Safety Protection: With the intelligent chip inside, it matches the current as your device's needs automatically. USB adapter provides multi protections against over-current, over-voltage, over-heating and short-circuit, Keep your device safe and ensure safer charging overnight.

❉2 Charging Ports: 6 Pack Dual USB ports USB charger allow you charge with two devices, when you need to charge more device at home, house, office, it is convenient and save the space.

【Mag-Safe 3-in-1 Wireless Charging Stand】PETINO Mag Safe Charger 3 in 1 makes fast charging safe and easy. The built-in super strong magnet makes alignment instantly and precisely, just 1 second to achieve lightning fast wireless charging. The iphone magsafe charger can hold your iphone horizontally and vertically, or in any directions. The anti-slip design on the bottom makes charging safer.

【Wireless Charging Station for Multiple Devices】Our magsafe charger stand provides 3 parts to charging your iphone, Apple Watch, AirPods at the same time. Charging three devices simultaneously, and no interfere with each other. Say goodbye to messy desktop and enjoy your life. The fast wireless charging station compatible with iPhone 14 ,13,12 Pro Max/Pro/Mini/Plus, Apple Watch series Ultra 8/7/SE/6/5/4/3/2/1，Airpods 2/3/Pro.

【Fast Wireless Charger for iPhone】The iPhone Mag-Safe charger has passed hundreds of tests in our laboratory. It takes 3 hours to fully charge the iphone from 0 to 100, and some of them take 3.5 hours. (Depends on battery condition and and the ambient temperature). It is highly recommended to charge without a case or use a case with Mag-Safe. Supporting fast magnetic charging for iphone (non-magnetic phone case should be less than 3mm) and apple watch.

【Safety Efficient Fast Charging】 The Power Delivery Wall Charger for iPhone owns bulit-in multi-protection system, avoiding from over-voltage, over-charge, over-heat, etc. The smart chip including in the MFi certified lightning cable match the current required by the Apple device automatically, charge your iPhone/iPad device fast, safely and steadily.Tangle-free 6 Feet length is convenient for usage while charging and sync at home/office/travel in bed, hotel rooms, and more.

【What you will get】Long-time Worry-Free Friendly Support! 3 pack 6 foot long Apple MFI-certified usb c to lightning cable and 3 super apple fast charging USB C wall charger! We are very confident in the long-lasting performance of the certified USB C iphone wall charger and power cord. Just contact us and we can provide the brand with additional worry-free product support and a free customer service store!

【PD 3.0 Fast Charger for iPhone】 iPhone Fast Charger equipped with 20W PD 3.0 USB Type C power delivery wall plug, PD 3.0 Quick-Charge USB C port provides Max 20W output power, charging your iPhone 12 up to 50% in just 30 minutes, saving over 1.5hrs for you.

►【25W USB C Fast Charging Block】 Apply Power Delivery Technology for efficient charging, Eversame USB C charger block provide maximum 25W power to fast charging your phone, tablet, iPad, iPhone and other USB C devices. Your Samsung S22/S21/S20/Note 20 can up to 100% in about 60 minutes, offer maximum 20W output power for iPhone 13/13 Mini/13 Pro/13 Pro max/12/11/X/XR, 4 times faster than the original 5W charging block and save your time.

· ►【Universal Type C Wall Plug Adapter】Type c charger fast charging equipped with PD technology, provide super fast charging for iPhone 13/13 Pro/13 Pro max, Phone 12/12 Mini/12 Pro/12 Pro max, iPhone 11/11 pro/11 pro max/XS/XS Max/XR/X, iPad Pro 12.9 Gen 5/4/3 in 2021/2020/2018, iPad Pro 11 Gen 2/1, iPad Air 4, Samsung Galaxy S22/S22 Ultra/S22 Plus/Z Fold3/S21/S21+/S21 Ultra/S20/Note 20/20 Ultra/Note 10, Google Pixel 6XL/5 XL/4 XL, provide full speed charging for other USB C devices as well.

· ►【Safe and Reliable】 Intelligent chip of USB wall charger can automatically detect connected device and provides optimal input power to your devices, ensure fast charging while protecting the battery. Multiple protection system to avoid over-current, short-circuit, over-heating and over-voltage, keeping protect your device and ensure the safe charging overnight.

Premium Performance: Dual-USB output with total current 5V/2.1A and input with 100-240V enables you to charge two mobile devices simultaneously at high speed.It can really save your time.

Safety assurance: AILKIN'S charger has protection system against over charging, over currents, and over heating. The charger will automatically stop charging when power is full, which can maximumly protect your device.

Lightweight:Home charger adapter allows charging at home or in the office via USB cable connection. Simply plug in the USB cable, and plug the adapter into the wall. Compact, lightweight, portable, stylish, easy to store.

【Fast Charge Quick charger 3.0】:With Quick charge 3.0 Technology, 4 times faster than normal standard, 30W 2-Port adaptive fast charging rapid charge your phone from 0% to 50% charged in just 35 minutes. Also backward compatible with QC 2.0&1.0. 4Pack included makes it a must-have for various charging situations and great to share with family members.

【Dual-port Fast Charger】: 2 USB ports (1xQuick 3.0 + 1x5V2.4A) up to a 30W max. output, could charge 2 devices at the same time with full speed. Quick charge 3.0 port for QC devices, 5V / 2.4A port for non-QC devices. Combines 2 charging ports in a single wall charger, ensures the fastest charging speed and compatibility for all USB powered devices, including Android & IOS phones and tablets.

【Broad Compatibility】:This Charging Adapter is compatible with IOS devices, Android smartphone devices,all kinds of tablets and other digital products including iPhone 11Pro/XS Max/XR/X/ 8/7 Plus, Samsung Galaxy S10/S9/S8/S7 Plus, S7/S6 Edge, S5/S4, Note 9/8/5/4, OnePlus, LG, Sony Xperia, Nokia, Nexus, Bluetooth Headphones, Power Bank and more.

2 in 1 USB charger for in the car and at the wall

Features 2 USB ports for charging up to two devices simultaneously

Foldable wall charger prongs for easy storage; quick release for use in the home or office

POWERFUL DUAL PORTS FAST CHARGER: Can get 2 digital devices charged at a high speed to save your charging time. The Quick Fast Charge 3.0 USB port adopt Fast Charge technology like other Samsung fast charger. It can provide up to 18W to ensures charge speeds up to 4 times faster than traditional chargers. The other port doesn’t support Fast charge but can automatically detect the charging devices and output the optimal current up to 2.4A.

RELIABLE AND SAFE CHARGER BLOCK: Multi-protection system against over charging, over-voltage, over currents, and short-circuit. Protect the safety of you and your devices. The flame-retardant PC casing is super lightweight and durable so the wall charger can withstand scratches, bumps, and drops.

IDEAL IN DIFFERENT OCCASIONS: The compact size can save outlet space. You can left them in office, home, hotel or other places. AC100-240V input is ideal for home, worldwide travel or business. You can also share them with your couple, families, workmate, friends.

Smart Dual Port 12W / 2.4A USB Wall Charger charges your iPad, iPhone, iPod, HTC, Blackberry, MP3 Players, Digital Cameras, PDAs, Mobile Phones including Apple iPhone 6 Plus, 6 , 5S, 5C, 5; iPad Air, 2, Mini, New iPad; Samsung S5 S4 S6, Galaxy Tab, HTC O, 2 M8 and More *

Specifically Designed Smart Dual Port Switch device will automatically reallocate the most efficient charging current and charging speed for your smart phones and tablets with over current and electric shock proof protection

Specially re-designed IC with over-heat, over-current, over-charging protection. Charging process with automatically be terminated when the battery capacity reach 100%

High-Speed Single Port Charger: Connect a single USB-C device to get a 65W max charge. Charge the MacBook Air M2 to 51% in 30 Minutes.

One Charger, More Devices: Ugreen's 65W USB C charger provides an enormous 65W of charging power; enough to fast charge phones, tablets, and laptops. All from a single charger.

Travel-Friendly, Compact Design: Thanks to a cutting-edge GaN chip, Ugreen's 65W USB-C charger is 50% smaller than the original 61W USB-C charger. A foldable plug provides more portability and a better travel experience.

【UNIVERSAL TRAVEL ADAPTER IS READY FOR YOU!】 Are you a travel enthusiast? Are you always on business trip? Are you worried about charging your phone and IPADS? HAOZI international travel power adapter can solve your charging issues by providing EU/UK/AUS/US Plugs and socket adapters, three USB charging ports and a Type-c Charging port.

【ADVANCED CHARGING PORT DESIGN】 Compared with traditional Travel adapter’s USB Charging port design. HAOZI World adapter plug comes with 3 USB 3.0 charging PORT + a Type-C charging PORT. So, it can not only charge the regular devices but also work for all those devices with Type-C charging port. Like: MACBOOK, CHROMEBOOK PIXEL and SAMSUNG GALAXY S9 and so on.

【SAFE AND RELIABLE CHOOSING】 This International Travel Power Adapter With CE qualified Certified safety system, max smart fast charging, prevents leakage, dust-proof and adopt environmental friendly PC material. Safety 6.3 Amp fuse ensure completely to protect the safety of the user and the service time of your devices.

AILKIN USB block is designed to be thin and Flat making the wall charger more stable when plugging in the outlet than a usual charger cube. Plug pins and USB ports are at 90-degree angles instead of straight out. Free to worry about the kids & pets running into charging cords. Easy to reach wall sockets behind furniture.

Square charger adapters connect all USB-A port cables to mobile phones & tablets. Applies to iPhone 14 Pro Max, 14 Pro, 14, 13 Pro Max, 13Pro, 13 Mini, 13, 12 Pro Max, 12Pro, 12 Mini, 12, SE, 11Pro Max, 11 Pro, XR, XS MAX, XS, X, 8 Plus, Samsung Galaxy S22 S21 Ultra 5G S21+ S20 S10E S10 Plus S9 Plus S8+ S7 Edge J8 J7 Note 20 10 9 A13 A12 A02S A03S A32 A22 A51 A71 A72 5G, Google 6 Pro 5a 5 4A 4XL 3xl 2xl, iPad Air, iPad mini, iPad Pro, LG Stylo 6 5 4, V60 V50 HTC, LG, Moto, Kindle Fire, etc.

Dual USB multi-port output enables you to charge two devices simultaneously at high speed, Single-Port maximum output 2.4A, and 2 ports share it(doesn't support Qualcomm Quick Charge 3.0). It is convenient for traveling and home usage.

ADAPTIVE FAST CHARGE: Supports fast charging for Samsung Phones, QC 3.0/2.0, and Adaptive Fast Charging (AFC) compatible devices. Enables you to charge your phones up to 50% battery level in 30 minutes, 75% faster than standard chargers.

SAFETY GUARANTEE: Passed UL62368-1 Certification.Protects your device against over-heating, over-charging, and over-current or damaging your devices, providing a safe charge Input 100V-240V (U.S. and World Standard); Output: DC 5.0V - 2Amp (U.S. and World Standard)

WIDELY COMPATIBLE: Compatible with Samsung Galaxy S21/S21+/S21 Ultra/Note 20/S20 Ultra/S10/S10+/S20/S20+/S9/S9+/S8/S8+/S7/S7 Plus/S7 Active/S6/S6 Plus/Edge/Active, Note5/8/9/10/20, LG G5 G6 G7 V20 V30 V40 ThinQ Plus and more fast charge supported devices.

Smart Dual Port 12W / 2.4A USB Wall Charger compatible with iPhone 11,iPhone X, iPhone XR, iPhone 8, iPhone 7, 7 Plus, iPhone 6 Plus, 6 iPad Air, iPad Pro, iPad Mini and all devices that can charge with USB port

Certified 6ft Nylon Braided charging Cable ensures durability and long lasting product life span (Please refer to the last image on our product webpage for the screenshot of certification)

Specially re-designed IC with over-heat, over-current, over-charging protection. Charging process with automatically be terminated when the battery capacity reach 100%

【Fast Charger 3.0】:With Fast charge 3.0 Technology, this QC 3.0 Wall Charger is 4x faster than common chargers,charging up to 50% in 30 minutes,give you a high speed charging experience. It also compatible with QC2.0 and 1.0 Technology. Please confirm: your device supports QC 3.0/2.0 & needs a fast charge USB Cable.

【Dual USB Wall Charger】: The dual port fast charger block with 2 USB ports (1xFast charging 3.0 + 1x5V2.4A) up to a 30W max Output. 1 charging for 2 needs, can fast charging different types of devices (such as iPad+iPhone, etc.) at the same time. Fast charging 3.0 port for QC devices, 5V / 2.4A port for non-QC devices. Combines 2 charging ports in a single wall charger, ensures the fastest charging speed and compatibility for all USB powered devices, including Android & IOS phones and tablets.

【Universal Compatibility】:This charging adapter is compatible with IOS devices, Android smartphone devices, all kinds of tablets and other digital products. Compatible for Samsung S20 S10 S9 S8 S8+ Note 8 A10s A21s A51,Pixel, iPhone, iPad, Nexus Moto, Switch, Power Bank, PS4 Controller, Bluetooth Speaker,MP3/MP4 players, GPS devices, PC tablet, Bluetooth Headphones, Power Bank and other digital devices.

【3 in 1 Universal Compatible Wireless Charger】Our wireless charging dock can charge most phones, Apple Watch and Airpods simultaneously, just place them on the charging surface, enjoy fast wireless charging. Wide compatibility for all Android and IOS devices which support wireless charging. The stand can help to clean up a lot of messy cables on your nightstand and makes your life more tidy. Note: Please use our equipped wall charger adapter and Type-C charging cable for fast charging, other charging cables or adapters may affect the charging speed.(Black or white adapter is provided randomly)

【All-round upgrade!】The magnetic positioning design of the bracket can fix the position of the bracket and avoid manual adjustment; The heat dissipation area is larger, and the charging efficiency is improved. There are heat dissipation blocks for the iWatch, mobile phone and base respectively. In addition, the mobile phone charging section has a raised design, which is more suitable for the mobile phone when charging, which greatly improves the charging efficiency.

【Fast Charging Speed & Multi-Protection】Equiped with 18W upgraded large power adapter, the wireless charging station can fast fully charge your phone within 2-3 hours. The wireless charger is with intelligent protect technology, provides temperature control, over-voltage protection, short-circuit prevention, over-current protection and more. Reasonable internal circuit design can prevent overcharge damage to the equipment battery and ensure safe charging of the device.

✔️[ Specification ]- Input: AC 100~240V, 50/60Hz, 0.4A Max. Output: DC 5V 1A, DC 5 Volt 1000mA. Cable Length: 5ft/1.5meters.

✔️[ Guaranteed Safety ] - Energy Efficiency Index as Six, 6 Levels. Intelligent circuit design protects against short circuiting, over-heating, over-current, and over-charging.

✔️[ Compatibility List ] - Fits the cube camera of most brand with 5V 1A power supply. This micro USB charging cable can charge well with Samsung, Motorola, Nexus, Nokia, LG, Sony, Blackberry, Kindle, Android smartphones, Tablet,Xbox, PS4, MP3, Power bank and more. ONLY FOR CHARGING, DOES NOT SUPPORT DATA TRANSMISSION FOR MOBILE PHONE.

Fast Charging and Syncing: This USB C cable supports quick charge up to 5V/3A for devices and data syncing speed up to 480Mb/s. Puxnoin USB-C cable provides up to 5V/3A safe charging current, which charging speed increased by 40%. You can also sync data between two devices with this type c charger cable. Recommend using an original wall charger for fast charging.

Durable and Tangle-free USB C Cord : Strong fiber, the most flexible, powerful and durable material, makes tensile force increased by 200%. Can bear 10000+ bending test. Premium Aluminum housing makes the cable more durable, nylon braided long usb type c cable adds additional durability and tangle free.

Wide Compatibility Phone Charger C Type: Work with All USB Type-C devices such as Samsung Galaxy S20/S10/S9/S9 Plus, Note 8,S8,S8 Plus, LG V30 V20 G6 G5,Macbook,OnePlus 3T 2,Nexus 5X/6P,Google Pixel, Moto Z2 Play, Lumia 950 and other type c charging cable devices.

【COMPATIBILITY】Provide a micro USB cable, which is preferentially compatible with micro USB powered devices: Samsung, Kindle, HTC, Motorola, Nokia, LG, Android smartphones, Galaxy S7 edge, J7, note 5, MP3, Sony, Xbox, PS, Vita, Nintendo DS, GPS devices, battery packs, Bluetooth speakers, wireless keyboards, cameras, cameras, games consoles, hard drives, e-readers, printers and more.

【POWERFUL CAPACITY WITH DOUBLE CHARGING】Dual USB ports have total 24W/4.8A power, and allows you to charge two devices simultaneously at optimal speed. Tips: provide a micro USB cable.

【Compact Charger】it is only the size of a car key, and the charging head can be folded into a small square. You can easily put it in any backpack, and there is a carrying case for storing the charger and cable, which is easy to carry. 100-240 volt input are ideal for worldwide travel.

Motorola Original- Motorola SC-41 10 Watt charger with 3.3 ft SKN6461A USB-A to micro-USB cable in retail box with Welcome Guide

Safe and Efficient- UL Safety Approved and meets Level VI High Energy Efficiency

Rapid, dependable charging for the Moto E6, E6 Plus, E6s, E5, E5 Play/Cruise, E4, E4 Plus, E3, E3 Power, G8 Power Lite (NOT for G8 Power!!!), G5, G4, G4 Play, G3, micro-USB devices

CHARGE 3 DEVICES: The Power Trio Adapter lets you charge three devices — all at the same time! Experience the power and versatility of a triple-port charger*

FAST & RELIABLE CHARGING: Go for the fast charge—with speed, stability and power; Power up a wide range of devices in a snap with Super-Fast Charging** and up to 65W total power output***

UNIVERSAL COMPATIBILITY: Maximize your charging time; Power up a wide range of devices from earbuds and laptops to phones and tablets

A White wall mount charger that has 4 USB charging ports that can be installed in all types of vehicles and for home use all well.

The USB outlet is able to charge most current electronic devices, four at a time, including smart phones, tablets, cameras, e-readers and MP3 players. USB ports are capable of charging 4 devices simultaneously.

Charging Specifications: Input: 12-24V, Output: 2.4A per each USB port while charging 4 devices simultaneously. Maximum power consumption: 48 Watts

▃ [YANER 10 Smart USB Port]: 5V / 2.4A * 2and5V / 2.1A * 4and5V / 1A * 4 USB ports can automatically detect the device and provide the fastest charging speed, up to 2.4A or 10A50W, a total of 10 A USB port can charge 10 devices at the same time

▃ [Wide compatibility]: AC100-240V wide input voltage range is very suitable for international travel, compatible with all 5V USB charging devices, such as iPad, iPhone, Samsung Tab, smart phones, mobile power, Bluetooth headsets and a variety of devices

▃ [Compact and lightweight design]: The lightweight and compact design is very suitable for home, office and desktop use. It saves space and is better organized when charging the device